| 水射流促进煤基质收缩提高煤层透气性机理分析 |
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| 引用本文： | 卢义玉,宋晨鹏,刘勇,康勇. 水射流促进煤基质收缩提高煤层透气性机理分析[J]. 重庆大学学报(自然科学版), 2011, 34(4): 20-23 |
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| 作者姓名： | 卢义玉 宋晨鹏 刘勇 康勇 |
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| 作者单位： | 卢义玉,刘勇,LU Yi-yu,SONG Chen-peng,LIU Yong,KANG Yong(重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆,400044);宋晨鹏,康勇(重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆,400044) |
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| 基金项目： | 国家创新群体基金资助项目，重庆市杰出青年基金资助项目，重庆大学研究生科技创新基金资助项目 |
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| 摘 要： | 高压脉冲水射流割缝是新型有效的增透技术,但增透机理尚未明确,制约了其在不同赋存条件煤层中的推广应用.文中从煤基质收缩提高煤层透气性角度出发,在分析高压水射流冲击煤体的动态效应基础上,得出冲击动态方程;理论分析了在高压脉冲水射流作用下煤基质的受力状态,得出了高压脉冲水射流能够促使煤基质收缩,并推导出射流冲击力-煤基质的关系方程,在此基础上采用P-M模型,得出射流作用下煤层内瓦斯渗流方程,为高压脉冲水射流割缝增透技术的推广应用提供了理论支撑.
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| 关 键 词： | 高压脉冲水射流 煤基质收缩 煤层透气性 瓦斯渗流 |
| 收稿时间： | 2010-10-23 |
Mechanism analysis of permeability based on promoting coal matrix shrinkage by water jet |
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| LU Yi-yu,SONG Chen-peng,LIU Yong and KANG Yong. Mechanism analysis of permeability based on promoting coal matrix shrinkage by water jet[J]. Journal of Chongqing University(Natural Science Edition), 2011, 34(4): 20-23 |
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| Authors: | LU Yi-yu SONG Chen-peng LIU Yong KANG Yong |
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| Affiliation: | LU Yi-yu,SONG Chen-peng,LIU Yong,KANG Yong(a.National & Local Joint Engineering Laboratory of Gas Drainage in complex cocl seam,b.Key Laboratory for the Exploitation of Southwest Resources and Environmental Disaster Control Engineering of Ministry of Education,Chongqing University,Chongqing 400044,China) |
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| Abstract: | High pressure pulsed water jet(HPWJ) is a new technology of effectively improving coal seam permeability.However,the mechanism of increased permeability is not yet clear,which restricts the application of HPWJ in different coal seams.From the perspective of improving permeability by coal matrix shrinkage,the impelled dynamic equations is established based on analysis of coal dynamic effects by water jet.According to theoretical analysis of the stress state of coal matrix,it is concluded that HPWJ can promot... |
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| Keywords: | high pressure pulsed water jet coal matrix shrinkage permeability of coal gas seepage |
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